An ablating device has a cover which holds an interface material such as a gel. The cover contains the interface material during initial placement of the device. The ablating device may also have a removable tip or a membrane filled with fluid. In still another aspect, the ablating device may be submerged...http://www.google.de/patents/US8057465?utm_source=gb-gplus-sharePatent US8057465 - Methods and devices for ablation
